Italian Alder (Alnus cordata) is a deciduous tree native to the southern Apennine Mountains and Corsica. It is a fast-growing species, reaching heights of up to 25 meters, and is characterized by its heart-shaped leaves and smooth, grey bark. In agroecology and regenerative agriculture, it serves as a valuable nitrogen-fixing species, enhancing soil fertility and structure. Italian Alder is often used in windbreaks, erosion control, and as a pioneer species in reforestation projects due to its resilience and adaptability. It plays a significant role in food forests as a canopy layer, providing shade and improving microclimates. Historically, it has been used for timber and firewood. In guilds, it pairs well with understory plants like comfrey and nitrogen-loving species such as berry bushes.
Growing Details
Italian Alder thrives in full sun and can tolerate a wide range of soil types, including poor and compacted soils. For optimal growth, prepare the soil by incorporating organic matter to improve drainage and fertility. Mulching around the base helps retain moisture and suppress weeds. Companion plants such as comfrey can enhance nutrient cycling. Avoid overwatering, especially in clay soils, to prevent root rot. Propagation is best done through seeds, which should be stratified for better germin
Edible Parts
Tags
Nitrogen Fixing Hedge Carbon Farming Attracts Wildlife Fire Wood Building Wood Windbreak Erosion Preventing Bee Friendly Visual Appeal Easy Propagating
Range (Based on GBIF Data)
The map shows known occurrence points of <strong>Alnus cordata</strong> recorded in scientific biodiversity databases.
Source: <a href="https://www.gbif.org" target="_blank">GBIF.org</a> โ Global Biodiversity Information Facility
Location & Timing
native geo location: Native to southern Italy and Corsica
applicable geo region: Mediterranean
language used: en
Flowering:
beginning
of March for 30 days
Harvest:
beginning
of September for 60 days
Seed Start:
beginning
of March
Indoor Start:
Transplant:
Uses & Benefits
Edible Rating:
(0/5)
edible uses:
Medicinal Rating:
(1/5)
medicinal uses: The bark of Alnus species, including Alnus cordata, has been traditionally used for its astringent properties. It can be used in poultices for minor skin irritations, although specific medicinal uses for Alnus cordata are not well-documented.
health concerns:
other uses: The wood of Italian Alder is used for firewood and timber. It is also valued for its ability to improve soil fertility through nitrogen fixation.
Scientific Literature
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Botanical data
specie: Alnus cordata
common names: Italian Alder; Corsican Alder; Heartleaf Alde
family: Betulaceae
sub family:
tribe:
sub tribe:
genus: Alnus
Growing Conditions
area needed: 0.0 m
spacing: 3.0 m
growing difficulty: Low
Deciduous / Evergreen: Evergreen
Seed Temp (Opt/Min/Max): 20ยฐC / 15ยฐC / 25ยฐC
Plant Temp (Opt/Min/Max): 0ยฐC / -15ยฐC / 35ยฐC
water demands: Medium
humidity:
light demands: High
root type: Medium
frost tender: Low
hardness:โโโโโโโโโโ(6/10)
first harvest: 0 years
life span: 60 years
succession: Pioneer
growth rate: Fast
max height: 25.0 m
max width: 10.0 m
soil preference:
Medium (Loam)
pH preference:
Neutral
flower type:
Monoecious
growth details: Italian Alder thrives in full sun and can tolerate a wide range of soil types, including poor and compacted soils. For optimal growth, prepare the soil by incorporating organic matter to improve drainage and fertility. Mulching around the base helps retain moisture and suppress weeds. Companion plants such as comfrey can enhance nutrient cycling. Avoid overwatering, especially in clay soils, to prevent root rot. Propagation is best done through seeds, which should be stratified for better germin
Potential Disturbances: Italian Alder is generally pest-resistant but can be affected by the alder leaf beetle and fungal diseases in overly wet conditions. Encourage beneficial insects like ladybugs and lacewings to control beetle populations. Planting garlic or chives nearby can help deter pests. Neem oil can be used as an organic spray for pest management.
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